ioctl

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originally posted by smcnutt@Oct 25 2005, 04:17 PM

hi andreas,

> has anybody an idea ?

if you set the "reduced device drivers" checkbox in the system library properties,

the ioctl operation is set to null ... in which case i believe the ioctl call will just return

-enotty.

regards,

--scott

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Hi Scott,

I think I get the answer to the problem.

I have to read out the AC Control BIT in the JTAG UART Control Register via IORD_AVALON.... The AC bit tells an external component is connected through the JTAG connector ( AC bit = set) or not. Once set it could only be reseted by writing a one to the AC bit. (see NIOS II Reference Handbook page 9-13).

Thank you for your help

Regards,

Andreas